import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'



Vue.use(Router)


const router = new Router({
  routes: [
    {path: '/', redirect: '/login'},
    {path: '/login', component: Login},
    {path: '/home', component: Home}
  ]
})

//挂载路由导航守卫
router.beforeEach((to,from,next) => {
  //to 代表将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  //next() 放行    next('/login')   强制跳转

  if(to.path === '/login')   return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
  })

export  default router
